I am used to shooting (metal) concerts in low light situations, in mosh pits, etc, but I've recently gotten a media pass for the Gwar-B-Q that is happening August 16th. It's from 10am to 7pm, outdoors and hopefully on a non-rainy day. I have permission to shoot all the bands, so along with the usual gear (17-35, 80-200 f/2.8, 50 f/1.8) I might even bring a film camera for some B/W grainy work...

Then I realized my film is all high ISO (800-1600) and this will be in the daytime, so suddenly all my tips for low light concert work just went out the window. I assume this should be easy to do, given that lighting won't be an issue, but then again perhaps I'll have too much light?

Do I go with a constant shutter speed, looking for shallow DoF given the stage will probably be messy, so how should I approach this?Please help.